A. U₂₃₃ and Pu₂₃₉
B. U₂₃₅ and Th₂₃₂
C. U₂₃₅ and Pu₂₃₈
D. U₂₃₃ and Pu₂₃₈
Please do not use chat terms. Example: avoid using "grt" instead of "great".
